[lo-i-gr-stufe-gerichtet-20101108, 1, en_US]
Figure 2-30
Logic diagram of the 67-1 element
Definite Time High-set Element 67-2
The directional overcurrent element basically works in the same way as the non-directional element. Pickup,
however, depends on the result of the direction determination. The direction determination is accomplished
using the measured quantities and the corresponding directional characteristics.
67-B1 PICKUP is used as setting values for the phase current; 67N-B1 PICKUP is used for the ground
current. A trip command is issued after pickup of an element and expiration of the associated time delays 67-
Functions
2.4 Backup overcurrent
SIPROTEC 4, 7SD80, Manual 79
E50417-G1100-C474-A2, Edition 02.2018
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